Positive Result Negative Reference Range. Was the urine or blood pregnancy test positive for pregnancy indicating the presence of a hormone called HCG. Ref range means the Reference Range or what is considered normal.
HSV-1 Test Results Interpretation Using IgG. What is a reference range. If you had symptoms consistent with COVID-19 within the past 3 weeks and tested negative repeat testing in 1-2 weeks may yield a positive result.
If your test result shows a value of positive or detected that falls outside of the reference range and would be.
A reference range is determined by testing large groups of healthy people to find what is normal for that group. Alternatively the same test in a population with an antibody prevalence exceeding 52 will yield a positive predictive value greater than 95 meaning that fewer than one in 20 people testing positive will have a false-positive test result. Instead theyre shown as a number -- like your cholesterol levels. Many lab test results are expressed as a number that falls within a reference range.